Summary

The Zipkin exporter remote endpoint cache accepted unbounded key growth derived from span attributes. In high-cardinality scenarios, this could increase process memory usage over time and degrade availability.

Details

- Introduce a bounded, thread-safe LRU cache for remote endpoints. - Enforce fixed maximum size to prevent unbounded growth.

Impact

- A process using Zipkin export for client/producer spans could experience avoidable memory growth under sustained unique remote endpoint values.

Resources

#7081